The crystallinity and the hydrophilicity are the two main factors influencing the membrane's vapor permeability for gas dehumidification. Herein, a novel 5-sulfosalicylic acid-polyvinyl alcohol-hydroxyethyl cellulose (SSA-PVA-HEC) vapor permeation membrane composing SSA capturing water layer and PVA-HEC transporting water layer was prepared. To reduce membrane crystallinity and increase vapor permeability, HEC was added to the PVA membrane matrix to form a transporting water PVA-HEC layer. To further improve the PVA-HEC layer's permeability, the surface of the PVA-HEC membrane was modified by the hydrophilic SSA, which acted as a capturing water layer. The results showed that the water vapor permeability of the SSA-PVA-HEC membrane improved from 1.19 × 10⁴ to 1.52 × 10⁵ Barrer. After dealt with SSA-PVA-HEC membrane, the relative humidity (RH%) of the feed (humid nitrogen) decreased from 90% to 23.4%. Overall, the low cost and the excellent dehumidification performance of the SSA-PVA-HEC membrane make it possible for industrialization.

结晶度和亲水性是影响气体除湿膜透气性的两个主要因素。在此，制备了一种由SSA捕集水层和PVA-HEC输水层组成的新型5-磺基水杨酸-聚乙烯醇-羟乙基纤维素(SSA-PVA-HEC)透汽膜。为了降低膜结晶度并增加蒸汽渗透性，将 HEC 添加到 PVA 膜基质中以形成传输水的 PVA-HEC 层。为了进一步提高 PVA-HEC 层的渗透性，PVA-HEC 膜的表面被亲水性 SSA 改性，作为捕获水层。结果表明，SSA-PVA-HEC膜的水蒸汽渗透率从1.19×10 ⁴提高到1.52×10 ⁵巴雷尔。经过SSA-PVA-HEC膜处理后，进料（湿氮）的相对湿度（RH%）从90%下降到23.4%。总体而言，SSA-PVA-HEC膜的低成本和优异的除湿性能使其产业化成为可能。